US2014323264A1PendingUtilityA1

Harmonic drive

22
Assignee: TECHNOLOGY CO LTD HARMONIC INNOVATIONPriority: Apr 28, 2013Filed: Apr 28, 2013Published: Oct 30, 2014
Est. expiryApr 28, 2033(~6.7 yrs left)· nominal 20-yr term from priority
Inventors:Chun-Shen Yeh
F16H 1/28F16H 2001/2881
22
PatentIndex Score
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Claims

Abstract

A harmonic drive includes a housing, a first gear, a second gear, and a driving unit. The first gear has a first number of teeth. The second gear is fixed to the housing, and has a second number of teeth. The second number is different from the first number. The driving unit is configured to drive the first gear to rotate when rotating. The driving unit includes a supporting base, and a plurality of third gears affixed to the supporting base in a rotatable manner, and each of the third gears is engaged with the first gear and the second gear.

Claims

exact text as granted — not AI-modified
What is claimed is: 
     
         1 . A harmonic drive, comprising:
 a housing;   a first gear, having a first number of teeth;   a second gear, fixed to the housing, the second gear having a second number of teeth, wherein the second number is different from the first number; and   a driving unit, configured to drive the first gear to rotate when rotating, the driving unit comprising:   a supporting base; and   a plurality of third gears, affixed to the supporting base in a rotatable manner, each of the third gears being engaged with the first gear and the second gear.   
     
     
         2 . The harmonic drive of  claim 1 , wherein the first gear and the second gear are external gears. 
     
     
         3 . The harmonic drive of  claim 1 , wherein the first gear and the second gear are internal gears. 
     
     
         4 . The harmonic drive of  claim 1 , wherein the plurality of third gears are separated by equal circumferential angles. 
     
     
         5 . The harmonic drive of  claim 1 , wherein pitch circle diameters of the third gears are smaller than pitch circle diameters of the first gear and the second gear. 
     
     
         6 . The harmonic drive of  claim 1 , wherein a pitch circle diameter of the first gear is equal to a pitch circle diameter of the second gear. 
     
     
         7 . The harmonic drive of  claim 1 , wherein a centerline of the first gear and a centerline of the second gear are identical. 
     
     
         8 . The harmonic drive of  claim 1 , wherein the first gear, the second gear and the third gears are rigid gears.

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